Kconfig: Add configurable Stack Canaries protection levels.

Introduce a configurable stack-protection level for the existing
CONFIG_STACK_CANARIES, instead of hard-coding -fstack-protector-all.
Add Kconfig choice STACK_CANARIES_LEVEL four selectable levels:

 -fstack-protector
 -fstack-protector-strong
 -fstack-protector-all (default)
 -fstack-protector-explicit

Signed-off-by: nuttxs <zhaoqing.zhang@sony.com>

Kconfig

@@ -2469,6 +2469,46 @@ config STACK_CANARIES
 		Enabling this option can result in a significant increase
 		in footprint and an associated decrease in performance.
 
+choice STACK_CANARIES_LEVEL
+    prompt "Stack Canaries Level Configuration"
+    default STACK_PROTECTOR_ALL
+    depends on STACK_CANARIES
+    ---help---
+        Based on the configuration options, configure the stack Canaries Level.
+
+config STACK_PROTECTOR
+    bool "-fstack-protector"
+    ---help---
+        Enable basic stack protection.
+
+config STACK_PROTECTOR_STRONG
+    bool "-fstack-protector-strong"
+    ---help---
+        Using stronger stack protection mechanisms may involve more complex
+        security checks.
+
+config STACK_PROTECTOR_ALL
+    bool "-fstack-protector-all"
+    ---help---
+        Enable stack protection for all functions, including those that are
+        typically not protected.
+
+config STACK_PROTECTOR_EXPLICIT
+    bool "-fstack-protector-explicit"
+    ---help---
+        Enable stack protection only for functions explicitly marked as
+        requiring stack protection.
+
+endchoice # Stack Canaries Level Configuration
+
+config STACK_CANARIES_LEVEL
+    string
+    default "-fstack-protector" if STACK_PROTECTOR
+    default "-fstack-protector-strong" if STACK_PROTECTOR_STRONG
+    default "-fstack-protector-all" if STACK_PROTECTOR_ALL
+    default "-fstack-protector-explicit" if STACK_PROTECTOR_EXPLICIT
+    depends on STACK_CANARIES
+
 config STACK_USAGE
 	bool "Generate stack usage information"
 	---help---